[libvirt] [PATCH v13 00/49] write separate module for hostdev passthrough

[Chunyan Liu]

These patches implements a separate module for hostdev passthrough so that it
could be shared by different drivers and can maintain a global state of a host
device.

Patches 1~6 are to switch existing qemu and lxc driver to use common library
lists, so that to maintain a global state of every host device.

Patches 7~45 are to extract general code from qemu_hostdev.c piece by piece,
make them reusable common APIs.

Patches 46: unit test for the virhostdev common library
Patches 47: add a hostdev backend type for xen
Patches 48: add pci passthrough to libxl driver based on the common library
Patches 49: change lxc to use common library APIs

---
changes to v12:
  * split "add hostdev passthrough common library" patch into small patches
    for easier review.
  * fix v12 comments
  * rebase to libxl changes


Chunyan Liu (49):
  add 'driver' info to used_by
  qemu: reuse hostdev interfaces to avoid duplicate
  qemu: remove functions now used internally only from qemu_hostdev.h
  add virhostdev files to maintain global state of host devices
  qemu: use general virhostdev lists instead of its own
  lxc: use general virhostdev lists instead of its own
  qemu_hostdev: move cfg->relaxedACS as a flag
  qemu_hostdev: move ColdBoot as a flag
  qemu_hostdev: move netconfig file location to virhostdev stateDir
  extract general code from qemuPrepareHostdevPCIDevices
  rename qemu*NetConfigRestore/Replace to
    virHostdevNetConfigRestore/Replace
  rename qemuGet*PciHostDeviceList to virHostdevGet*PciHostDeviceList
  pass driver name as a parameter to virHostdevPrepareHostdevPCIDevices
  extract general code from qemuDomainReAttachHostdevDevices
  pass driver name as a parameter to virHostdevReAttachPCIDevices
  rename qemuReAttachPciDevice to virHostdevReAttachPciDevice
  move virHostdevPrepare(ReAttach)PCIDevices to virhostdev.c
  extract general code from qemuUpdateActivePciHostdevs
  extract general code from qemuUpdateActiveUsbHostdevs
  extract general code from qemuUpdateActiveScsiHostdevs
  pass driver_name as parameter of virHostdevUpdate*Hostdevs functions
  move virHostdevUpdate* functions to virhostdev.c
  qemuPrepareUSBDevices: code adjustment for extracting general code
  extract general code from qemuPrepareHostUSBDevices
  rename qemu*USBDevices to virHostdev*USBDevices
  pass driver name to virHostdevPrepareUSBDevices
  move virHostdevPrepareHostUSBDevices to virhostdev.c
  extract general code from qemuPrepareHostSCSIDevices
  pass driver name as parameter to virHostdevPrepareSCSIDevices
  move virHostdevPrepareHostSCSIDevices to virhostdev.c
  extract general code from qemuDomainReAttachHostUsbDevices
  pass driver name as paramter to virHostdevReAttachUsbHostdevs
  move virHostdevDomainReAttachHostUsbDevices to virhostdev.c
  extract general code from qemuDomainReAttachHostScsiDevices
  pass driver name as parameter to virHostdevReAttachScciHostdevs
  move virHostdevReAttachHostScsiDevices to virhostdev.c
  extract general code of NodeDeviceDetach
  extract general code of NodeDeviceReAttach
  extract general code of NodeDeviceReset
  move virHostdevNodeDevice* to virhostdev.c
  improve parameter name to let it more meaningful
  rename some function names to keep consistency
  improve virHostdevUpdate* parameters to make it more widely used
  add 3 wrapper functions for prepare/reattach/update domain hostdevs
  add parameter checks to common interfaces
  add unit test for new virhostdev common library
  change lxc_hostdev.c to use virhostdev common library APIs
  add hostdev pci backend type for xen
  add pci passthrough to libxl driver

 .gitignore                    |    1 +
 docs/schemas/domaincommon.rng |    1 +
 po/POTFILES.in                |    1 +
 src/Makefile.am               |    1 +
 src/conf/domain_conf.c        |    3 +-
 src/conf/domain_conf.h        |    1 +
 src/libvirt_private.syms      |   19 +
 src/libxl/libxl_conf.c        |   63 ++
 src/libxl/libxl_conf.h        |    4 +
 src/libxl/libxl_domain.c      |    9 +
 src/libxl/libxl_driver.c      |  447 +++++++++++-
 src/lxc/lxc_conf.h            |    4 -
 src/lxc/lxc_driver.c          |   17 +-
 src/lxc/lxc_hostdev.c         |  315 +--------
 src/qemu/qemu_command.c       |    3 +-
 src/qemu/qemu_conf.h          |   10 +-
 src/qemu/qemu_driver.c        |   88 +--
 src/qemu/qemu_hostdev.c       | 1220 ++-----------------------------
 src/qemu/qemu_hostdev.h       |   27 +-
 src/qemu/qemu_hotplug.c       |   77 +--
 src/qemu/qemu_process.c       |    8 +-
 src/util/virhostdev.c         | 1621 +++++++++++++++++++++++++++++++++++++++++
 src/util/virhostdev.h         |  140 ++++
 src/util/virpci.c             |   31 +-
 src/util/virpci.h             |    9 +-
 src/util/virscsi.c            |   32 +-
 src/util/virscsi.h            |    7 +-
 src/util/virusb.c             |   31 +-
 src/util/virusb.h             |    8 +-
 tests/Makefile.am             |    5 +
 tests/virhostdevtest.c        |  507 +++++++++++++
 tests/virscsitest.c           |    6 +-
 32 files changed, 3081 insertions(+), 1635 deletions(-)
 create mode 100644 src/util/virhostdev.c
 create mode 100644 src/util/virhostdev.h
 create mode 100644 tests/virhostdevtest.c